Automatic centrifugal pump.



A, C. PULSMEIER. AUTOMATIC GENTRIFUGAL PUMP. APPLIGATION-IILED APRJO,1912.

g. Patented Nov. 26, w12.

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specification of Letters Estant. Applicaton'ed April lo. 1912.

Patenten new? ee, rara'. Serial No. 689,779.

To au when amy colmm- Be it lnmwn that l, sinner 4J. Panne. Meran,citizen of the United States, resldin at Alameda, `in the county ottAlameda an .State ot California, 'have vimented new `and usefulImprovements 4in Ihutomatic Centrifugal Pumps, of which the 'followingis a specification. Y

This invention relates*fate centrifugal.

pumps and pertains especially tu,'imprealesv ments in.. the means for anau-tofmatic, balance.

ing drawing, in -whichrllhe vdrawing is a sectional vlew Illustratlngthe Invention.

A islaJ pump casing. A

2 is the impeller havingV the radial discharge passages 3 opening intothe volute 4 of the case. 1

5 is the shaft carrying the runner.

6 isy the suetion inlet.

-7 is avariable pressure chamber-formed on-the side of the runneropposite the suc-v tion between the adjacent wall of the case and anannular disk plate 8, which is removably secured 'to the back of therunnerA by suitable means as the screws 9.

10 is a vacuum chamber formed within the runner between the dish plate 8andthe integral opposite wall of the runner; this vacuum chamber10having a discharge into the runner through the 'ports 11. y p v 12 arepumping lvaines hy which the charnber 10 may be provided. The dish plate8 lits snug against an annular frange 13. on the back of the runnenandwhich iange 13- forms the circumferential wall furthe vacuum chamber 10.vThe disk plate 8 has a peripheral' projection 14C beyond the flange 13adapted to co-act with a xed ring plate 15 on the case, and re 11a-tethe entry of water from the space o uncontrolled pressure 4: in the caseinto the variable pressure space 7. The inner edge of the disk plate 8on the side opposite the fixed plate 1-5 is designed to co-act with thevertical surface 16 on the xed hub or hex of the runner shaft fuechamber 10.-

The operation is as follows: @neunte-oiled pressure water is prevalenton both sides of y lt finds its Way through a I thev runner. slightclearance between the stationary ring' 15 and therunner plate 8. rlhesetwo surfaces do not touch, a film of water under pressure separating thetwo faces.

is bac ofthe runner plate and the face 16 of the huh, so that thecircumference of the runner plate, times the-thickness of the filml lot'water between the stationary ring and ofthe parts and the'l runnerplate represents the area through 'which pressure water finds its wayinto the variable pressure chamber 7, and, further,"l

amount of water must find its way back into the runner through thecent-ral port 17 into vacuum space 10, and thence through --theports 11back into the main pumping ports of the runner'. To accomplish this, itis necessary to have su'ficie t clearance between the runner plate 8 ahthe hub 16 to discharge an amount of water equal to that passing intothe variablepressure chamber 7; thus, it isseen that apprximately if therunner plate should be 10 diameter andthe clearance between the runnerplate and the stationary ring we must have about g1g clearance, shouldthe diameter of the central port 17 5". The theory. is that the moreclearance is given between the stationary ring 1,5 and runner plate 8,the more clearance it is' necessary to provide between the faces'cf thehub v16 and the back of the runner plate.- The runner will find somepo-V The `amount of'clearance between these two fates governed oy the'clearance 'between the l sition between the face of the stationary ring15 and the face of the huh 16 where the pressure in the variablepressure chamber will b'e such as to offset any pressure from the otherlside of the runner, which would' tend `"to throw it out of balahce.

Having thus. described my inventioh what l.' claim and desire to secureby Letters Patent -isi r LA centrifugal pumpVconsisting--in thecombination of a casing, a runner therein, the casing having a vsuctioninlet and a peripheral discharge, 'the-runner having on the sideopposite the suction an annular vacuum space formed by an annular flangeon that side ofthecase and a disk plate se- .cured to the 'fiangethecentral portion-of this plate extending inwardly toward the runnershaft, and coperating with a fixed surface concentric with and at rightangles to the shaft, a ring plate on the case co-acting with an annularrim portion of said disk4 plate which projects beyond vthe annularflange, and which ring plate is on the side of said rim opposite to thesaid concentric fixed surface, said disk plate having a limited movementbetween said concentric surface and said ring plate, said-disk plate andthe back of the casing inclosing an annular va riable pressure chamberthrough which the water circulates-from the space of uncontrolledpressure outside the runner and within the case through the runningjoints 'formed by said plates and surfaces, into the said vacuum spaceand thence back into the runner discharge. p i rA centrifugal pumpconsisting in the combination of a case, an inclosed runner vin the casehaving a suction inlet and a peripheral discharge, a variable pressurechamber` formed on the side of the runner opposite the suction andbetween the back of the' runneriand the adjacent -wall of the In'ularprojection on the runner and between which annular `projectionand'said ring plate a running'joint ina plane normal tothe shaft isformed.

In testimony whereof I have hereunto set- Y my hand in the presence oftwo subscribing witnesses. v ALBERT C; PAULSMEIER.- 'A Witnesses: l V lH. H. R. HUNT, R. N. Fono.

copies of this patent mayv 'be-.obtained for ve cents each; byaddressing lthe v Commissioner or Patents,

Washington, D. .0.

